1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2013 Freescale Semiconductor, Inc.
7 #define pr_fmt(fmt) "fsl-pamu: %s: " fmt, __func__
11 #include <linux/fsl/guts.h>
12 #include <linux/interrupt.h>
13 #include <linux/genalloc.h>
14 #include <linux/of_address.h>
15 #include <linux/of_irq.h>
16 #include <linux/platform_device.h>
18 #include <asm/mpc85xx.h>
20 /* define indexes for each operation mapping scenario */
23 #define OMI_QMAN_PRIV 0x02
26 #define make64(high, low) (((u64)(high) << 32) | (low))
28 struct pamu_isr_data {
29 void __iomem *pamu_reg_base; /* Base address of PAMU regs */
30 unsigned int count; /* The number of PAMUs */
33 static struct paace *ppaact;
34 static struct paace *spaact;
36 static bool probed; /* Has PAMU been probed? */
39 * Table for matching compatible strings, for device tree
40 * guts node, for QorIQ SOCs.
41 * "fsl,qoriq-device-config-2.0" corresponds to T4 & B4
42 * SOCs. For the older SOCs "fsl,qoriq-device-config-1.0"
43 * string would be used.
45 static const struct of_device_id guts_device_ids[] = {
46 { .compatible = "fsl,qoriq-device-config-1.0", },
47 { .compatible = "fsl,qoriq-device-config-2.0", },
52 * Table for matching compatible strings, for device tree
53 * L3 cache controller node.
54 * "fsl,t4240-l3-cache-controller" corresponds to T4,
55 * "fsl,b4860-l3-cache-controller" corresponds to B4 &
56 * "fsl,p4080-l3-cache-controller" corresponds to other,
59 static const struct of_device_id l3_device_ids[] = {
60 { .compatible = "fsl,t4240-l3-cache-controller", },
61 { .compatible = "fsl,b4860-l3-cache-controller", },
62 { .compatible = "fsl,p4080-l3-cache-controller", },
66 /* maximum subwindows permitted per liodn */
67 static u32 max_subwindow_count;
70 * pamu_get_ppaace() - Return the primary PACCE
71 * @liodn: liodn PAACT index for desired PAACE
73 * Returns the ppace pointer upon success else return
76 static struct paace *pamu_get_ppaace(int liodn)
78 if (!ppaact || liodn >= PAACE_NUMBER_ENTRIES) {
79 pr_debug("PPAACT doesn't exist\n");
83 return &ppaact[liodn];
87 * pamu_enable_liodn() - Set valid bit of PACCE
88 * @liodn: liodn PAACT index for desired PAACE
90 * Returns 0 upon success else error code < 0 returned
92 int pamu_enable_liodn(int liodn)
96 ppaace = pamu_get_ppaace(liodn);
98 pr_debug("Invalid primary paace entry\n");
102 if (!get_bf(ppaace->addr_bitfields, PPAACE_AF_WSE)) {
103 pr_debug("liodn %d not configured\n", liodn);
107 /* Ensure that all other stores to the ppaace complete first */
110 set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID);
117 * pamu_disable_liodn() - Clears valid bit of PACCE
118 * @liodn: liodn PAACT index for desired PAACE
120 * Returns 0 upon success else error code < 0 returned
122 int pamu_disable_liodn(int liodn)
124 struct paace *ppaace;
126 ppaace = pamu_get_ppaace(liodn);
128 pr_debug("Invalid primary paace entry\n");
132 set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_INVALID);
138 /* Derive the window size encoding for a particular PAACE entry */
139 static unsigned int map_addrspace_size_to_wse(phys_addr_t addrspace_size)
141 /* Bug if not a power of 2 */
142 BUG_ON(addrspace_size & (addrspace_size - 1));
144 /* window size is 2^(WSE+1) bytes */
145 return fls64(addrspace_size) - 2;
149 * Set the PAACE type as primary and set the coherency required domain
152 static void pamu_init_ppaace(struct paace *ppaace)
154 set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY);
156 set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
157 PAACE_M_COHERENCE_REQ);
161 * Function used for updating stash destination for the coressponding
164 int pamu_update_paace_stash(int liodn, u32 value)
168 paace = pamu_get_ppaace(liodn);
170 pr_debug("Invalid liodn entry\n");
173 set_bf(paace->impl_attr, PAACE_IA_CID, value);
181 * pamu_config_paace() - Sets up PPAACE entry for specified liodn
183 * @liodn: Logical IO device number
184 * @omi: Operation mapping index -- if ~omi == 0 then omi not defined
185 * @stashid: cache stash id for associated cpu -- if ~stashid == 0 then
186 * stashid not defined
187 * @prot: window permissions
189 * Returns 0 upon success else error code < 0 returned
191 int pamu_config_ppaace(int liodn, u32 omi, u32 stashid, int prot)
193 struct paace *ppaace;
195 ppaace = pamu_get_ppaace(liodn);
199 /* window size is 2^(WSE+1) bytes */
200 set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE,
201 map_addrspace_size_to_wse(1ULL << 36));
203 pamu_init_ppaace(ppaace);
206 set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0);
208 /* set up operation mapping if it's configured */
209 if (omi < OME_NUMBER_ENTRIES) {
210 set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
211 ppaace->op_encode.index_ot.omi = omi;
212 } else if (~omi != 0) {
213 pr_debug("bad operation mapping index: %d\n", omi);
217 /* configure stash id */
219 set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid);
221 set_bf(ppaace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE);
223 set_bf(ppaace->win_bitfields, PAACE_WIN_TWBAL, 0);
224 set_bf(ppaace->addr_bitfields, PAACE_AF_AP, prot);
225 set_bf(ppaace->impl_attr, PAACE_IA_WCE, 0);
226 set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0);
233 * get_ome_index() - Returns the index in the operation mapping table
235 * @*omi_index: pointer for storing the index value
238 void get_ome_index(u32 *omi_index, struct device *dev)
240 if (of_device_is_compatible(dev->of_node, "fsl,qman-portal"))
241 *omi_index = OMI_QMAN;
242 if (of_device_is_compatible(dev->of_node, "fsl,qman"))
243 *omi_index = OMI_QMAN_PRIV;
247 * get_stash_id - Returns stash destination id corresponding to a
248 * cache type and vcpu.
249 * @stash_dest_hint: L1, L2 or L3
250 * @vcpu: vpcu target for a particular cache type.
252 * Returs stash on success or ~(u32)0 on failure.
255 u32 get_stash_id(u32 stash_dest_hint, u32 vcpu)
258 struct device_node *node;
263 /* Fastpath, exit early if L3/CPC cache is target for stashing */
264 if (stash_dest_hint == PAMU_ATTR_CACHE_L3) {
265 node = of_find_matching_node(NULL, l3_device_ids);
267 prop = of_get_property(node, "cache-stash-id", NULL);
269 pr_debug("missing cache-stash-id at %pOF\n",
275 return be32_to_cpup(prop);
280 for_each_of_cpu_node(node) {
281 prop = of_get_property(node, "reg", &len);
282 for (i = 0; i < len / sizeof(u32); i++) {
283 if (be32_to_cpup(&prop[i]) == vcpu) {
291 /* find the hwnode that represents the cache */
292 for (cache_level = PAMU_ATTR_CACHE_L1; (cache_level < PAMU_ATTR_CACHE_L3) && found; cache_level++) {
293 if (stash_dest_hint == cache_level) {
294 prop = of_get_property(node, "cache-stash-id", NULL);
296 pr_debug("missing cache-stash-id at %pOF\n",
302 return be32_to_cpup(prop);
305 prop = of_get_property(node, "next-level-cache", NULL);
307 pr_debug("can't find next-level-cache at %pOF\n", node);
309 return ~(u32)0; /* can't traverse any further */
313 /* advance to next node in cache hierarchy */
314 node = of_find_node_by_phandle(*prop);
316 pr_debug("Invalid node for cache hierarchy\n");
321 pr_debug("stash dest not found for %d on vcpu %d\n",
322 stash_dest_hint, vcpu);
326 /* Identify if the PAACT table entry belongs to QMAN, BMAN or QMAN Portal */
328 #define QMAN_PORTAL_PAACE 2
332 * Setup operation mapping and stash destinations for QMAN and QMAN portal.
333 * Memory accesses to QMAN and BMAN private memory need not be coherent, so
334 * clear the PAACE entry coherency attribute for them.
336 static void setup_qbman_paace(struct paace *ppaace, int paace_type)
338 switch (paace_type) {
340 set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
341 ppaace->op_encode.index_ot.omi = OMI_QMAN_PRIV;
342 /* setup QMAN Private data stashing for the L3 cache */
343 set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0));
344 set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
347 case QMAN_PORTAL_PAACE:
348 set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
349 ppaace->op_encode.index_ot.omi = OMI_QMAN;
350 /* Set DQRR and Frame stashing for the L3 cache */
351 set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0));
354 set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
361 * Setup the operation mapping table for various devices. This is a static
362 * table where each table index corresponds to a particular device. PAMU uses
363 * this table to translate device transaction to appropriate corenet
366 static void setup_omt(struct ome *omt)
370 /* Configure OMI_QMAN */
371 ome = &omt[OMI_QMAN];
373 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ;
374 ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA;
375 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
376 ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSAO;
378 ome->moe[IOE_DIRECT0_IDX] = EOE_VALID | EOE_LDEC;
379 ome->moe[IOE_DIRECT1_IDX] = EOE_VALID | EOE_LDECPE;
381 /* Configure OMI_FMAN */
382 ome = &omt[OMI_FMAN];
383 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI;
384 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
386 /* Configure OMI_QMAN private */
387 ome = &omt[OMI_QMAN_PRIV];
388 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ;
389 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
390 ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA;
391 ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSA;
393 /* Configure OMI_CAAM */
394 ome = &omt[OMI_CAAM];
395 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI;
396 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
400 * Get the maximum number of PAACT table entries
401 * and subwindows supported by PAMU
403 static void get_pamu_cap_values(unsigned long pamu_reg_base)
407 pc_val = in_be32((u32 *)(pamu_reg_base + PAMU_PC3));
408 /* Maximum number of subwindows per liodn */
409 max_subwindow_count = 1 << (1 + PAMU_PC3_MWCE(pc_val));
412 /* Setup PAMU registers pointing to PAACT, SPAACT and OMT */
413 static int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size,
414 phys_addr_t ppaact_phys, phys_addr_t spaact_phys,
415 phys_addr_t omt_phys)
418 struct pamu_mmap_regs *pamu_regs;
420 pc = (u32 *) (pamu_reg_base + PAMU_PC);
421 pamu_regs = (struct pamu_mmap_regs *)
422 (pamu_reg_base + PAMU_MMAP_REGS_BASE);
424 /* set up pointers to corenet control blocks */
426 out_be32(&pamu_regs->ppbah, upper_32_bits(ppaact_phys));
427 out_be32(&pamu_regs->ppbal, lower_32_bits(ppaact_phys));
428 ppaact_phys = ppaact_phys + PAACT_SIZE;
429 out_be32(&pamu_regs->pplah, upper_32_bits(ppaact_phys));
430 out_be32(&pamu_regs->pplal, lower_32_bits(ppaact_phys));
432 out_be32(&pamu_regs->spbah, upper_32_bits(spaact_phys));
433 out_be32(&pamu_regs->spbal, lower_32_bits(spaact_phys));
434 spaact_phys = spaact_phys + SPAACT_SIZE;
435 out_be32(&pamu_regs->splah, upper_32_bits(spaact_phys));
436 out_be32(&pamu_regs->splal, lower_32_bits(spaact_phys));
438 out_be32(&pamu_regs->obah, upper_32_bits(omt_phys));
439 out_be32(&pamu_regs->obal, lower_32_bits(omt_phys));
440 omt_phys = omt_phys + OMT_SIZE;
441 out_be32(&pamu_regs->olah, upper_32_bits(omt_phys));
442 out_be32(&pamu_regs->olal, lower_32_bits(omt_phys));
445 * set PAMU enable bit,
446 * allow ppaact & omt to be cached
447 * & enable PAMU access violation interrupts.
450 out_be32((u32 *)(pamu_reg_base + PAMU_PICS),
451 PAMU_ACCESS_VIOLATION_ENABLE);
452 out_be32(pc, PAMU_PC_PE | PAMU_PC_OCE | PAMU_PC_SPCC | PAMU_PC_PPCC);
456 /* Enable all device LIODNS */
457 static void setup_liodns(void)
460 struct paace *ppaace;
461 struct device_node *node = NULL;
464 for_each_node_with_property(node, "fsl,liodn") {
465 prop = of_get_property(node, "fsl,liodn", &len);
466 for (i = 0; i < len / sizeof(u32); i++) {
469 liodn = be32_to_cpup(&prop[i]);
470 if (liodn >= PAACE_NUMBER_ENTRIES) {
471 pr_debug("Invalid LIODN value %d\n", liodn);
474 ppaace = pamu_get_ppaace(liodn);
475 pamu_init_ppaace(ppaace);
476 /* window size is 2^(WSE+1) bytes */
477 set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, 35);
479 set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0);
480 set_bf(ppaace->impl_attr, PAACE_IA_ATM,
482 set_bf(ppaace->addr_bitfields, PAACE_AF_AP,
484 if (of_device_is_compatible(node, "fsl,qman-portal"))
485 setup_qbman_paace(ppaace, QMAN_PORTAL_PAACE);
486 if (of_device_is_compatible(node, "fsl,qman"))
487 setup_qbman_paace(ppaace, QMAN_PAACE);
488 if (of_device_is_compatible(node, "fsl,bman"))
489 setup_qbman_paace(ppaace, BMAN_PAACE);
491 pamu_enable_liodn(liodn);
496 static irqreturn_t pamu_av_isr(int irq, void *arg)
498 struct pamu_isr_data *data = arg;
500 unsigned int i, j, ret;
502 pr_emerg("access violation interrupt\n");
504 for (i = 0; i < data->count; i++) {
505 void __iomem *p = data->pamu_reg_base + i * PAMU_OFFSET;
506 u32 pics = in_be32(p + PAMU_PICS);
508 if (pics & PAMU_ACCESS_VIOLATION_STAT) {
509 u32 avs1 = in_be32(p + PAMU_AVS1);
512 pr_emerg("POES1=%08x\n", in_be32(p + PAMU_POES1));
513 pr_emerg("POES2=%08x\n", in_be32(p + PAMU_POES2));
514 pr_emerg("AVS1=%08x\n", avs1);
515 pr_emerg("AVS2=%08x\n", in_be32(p + PAMU_AVS2));
516 pr_emerg("AVA=%016llx\n",
517 make64(in_be32(p + PAMU_AVAH),
518 in_be32(p + PAMU_AVAL)));
519 pr_emerg("UDAD=%08x\n", in_be32(p + PAMU_UDAD));
520 pr_emerg("POEA=%016llx\n",
521 make64(in_be32(p + PAMU_POEAH),
522 in_be32(p + PAMU_POEAL)));
524 phys = make64(in_be32(p + PAMU_POEAH),
525 in_be32(p + PAMU_POEAL));
527 /* Assume that POEA points to a PAACE */
529 u32 *paace = phys_to_virt(phys);
531 /* Only the first four words are relevant */
532 for (j = 0; j < 4; j++)
533 pr_emerg("PAACE[%u]=%08x\n",
534 j, in_be32(paace + j));
537 /* clear access violation condition */
538 out_be32(p + PAMU_AVS1, avs1 & PAMU_AV_MASK);
539 paace = pamu_get_ppaace(avs1 >> PAMU_AVS1_LIODN_SHIFT);
541 /* check if we got a violation for a disabled LIODN */
542 if (!get_bf(paace->addr_bitfields, PAACE_AF_V)) {
544 * As per hardware erratum A-003638, access
545 * violation can be reported for a disabled
546 * LIODN. If we hit that condition, disable
547 * access violation reporting.
549 pics &= ~PAMU_ACCESS_VIOLATION_ENABLE;
551 /* Disable the LIODN */
552 ret = pamu_disable_liodn(avs1 >> PAMU_AVS1_LIODN_SHIFT);
554 pr_emerg("Disabling liodn %x\n",
555 avs1 >> PAMU_AVS1_LIODN_SHIFT);
557 out_be32((p + PAMU_PICS), pics);
564 #define LAWAR_EN 0x80000000
565 #define LAWAR_TARGET_MASK 0x0FF00000
566 #define LAWAR_TARGET_SHIFT 20
567 #define LAWAR_SIZE_MASK 0x0000003F
568 #define LAWAR_CSDID_MASK 0x000FF000
569 #define LAWAR_CSDID_SHIFT 12
571 #define LAW_SIZE_4K 0xb
574 u32 lawbarh; /* LAWn base address high */
575 u32 lawbarl; /* LAWn base address low */
576 u32 lawar; /* LAWn attributes */
581 * Create a coherence subdomain for a given memory block.
583 static int create_csd(phys_addr_t phys, size_t size, u32 csd_port_id)
585 struct device_node *np;
587 void __iomem *lac = NULL; /* Local Access Control registers */
588 struct ccsr_law __iomem *law;
589 void __iomem *ccm = NULL;
591 unsigned int i, num_laws, num_csds;
596 np = of_find_compatible_node(NULL, NULL, "fsl,corenet-law");
600 iprop = of_get_property(np, "fsl,num-laws", NULL);
606 num_laws = be32_to_cpup(iprop);
612 lac = of_iomap(np, 0);
618 /* LAW registers are at offset 0xC00 */
623 np = of_find_compatible_node(NULL, NULL, "fsl,corenet-cf");
629 iprop = of_get_property(np, "fsl,ccf-num-csdids", NULL);
635 num_csds = be32_to_cpup(iprop);
641 ccm = of_iomap(np, 0);
647 /* The undocumented CSDID registers are at offset 0x600 */
648 csdids = ccm + 0x600;
653 /* Find an unused coherence subdomain ID */
654 for (csd_id = 0; csd_id < num_csds; csd_id++) {
659 /* Store the Port ID in the (undocumented) proper CIDMRxx register */
660 csdids[csd_id] = csd_port_id;
662 /* Find the DDR LAW that maps to our buffer. */
663 for (i = 0; i < num_laws; i++) {
664 if (law[i].lawar & LAWAR_EN) {
665 phys_addr_t law_start, law_end;
667 law_start = make64(law[i].lawbarh, law[i].lawbarl);
668 law_end = law_start +
669 (2ULL << (law[i].lawar & LAWAR_SIZE_MASK));
671 if (law_start <= phys && phys < law_end) {
672 law_target = law[i].lawar & LAWAR_TARGET_MASK;
678 if (i == 0 || i == num_laws) {
679 /* This should never happen */
684 /* Find a free LAW entry */
685 while (law[--i].lawar & LAWAR_EN) {
687 /* No higher priority LAW slots available */
693 law[i].lawbarh = upper_32_bits(phys);
694 law[i].lawbarl = lower_32_bits(phys);
696 law[i].lawar = LAWAR_EN | law_target | (csd_id << LAWAR_CSDID_SHIFT) |
697 (LAW_SIZE_4K + get_order(size));
714 * Table of SVRs and the corresponding PORT_ID values. Port ID corresponds to a
715 * bit map of snoopers for a given range of memory mapped by a LAW.
717 * All future CoreNet-enabled SOCs will have this erratum(A-004510) fixed, so this
718 * table should never need to be updated. SVRs are guaranteed to be unique, so
719 * there is no worry that a future SOC will inadvertently have one of these
722 static const struct {
726 {(SVR_P2040 << 8) | 0x10, 0xFF000000}, /* P2040 1.0 */
727 {(SVR_P2040 << 8) | 0x11, 0xFF000000}, /* P2040 1.1 */
728 {(SVR_P2041 << 8) | 0x10, 0xFF000000}, /* P2041 1.0 */
729 {(SVR_P2041 << 8) | 0x11, 0xFF000000}, /* P2041 1.1 */
730 {(SVR_P3041 << 8) | 0x10, 0xFF000000}, /* P3041 1.0 */
731 {(SVR_P3041 << 8) | 0x11, 0xFF000000}, /* P3041 1.1 */
732 {(SVR_P4040 << 8) | 0x20, 0xFFF80000}, /* P4040 2.0 */
733 {(SVR_P4080 << 8) | 0x20, 0xFFF80000}, /* P4080 2.0 */
734 {(SVR_P5010 << 8) | 0x10, 0xFC000000}, /* P5010 1.0 */
735 {(SVR_P5010 << 8) | 0x20, 0xFC000000}, /* P5010 2.0 */
736 {(SVR_P5020 << 8) | 0x10, 0xFC000000}, /* P5020 1.0 */
737 {(SVR_P5021 << 8) | 0x10, 0xFF800000}, /* P5021 1.0 */
738 {(SVR_P5040 << 8) | 0x10, 0xFF800000}, /* P5040 1.0 */
741 #define SVR_SECURITY 0x80000 /* The Security (E) bit */
743 static int fsl_pamu_probe(struct platform_device *pdev)
745 struct device *dev = &pdev->dev;
746 void __iomem *pamu_regs = NULL;
747 struct ccsr_guts __iomem *guts_regs = NULL;
748 u32 pamubypenr, pamu_counter;
749 unsigned long pamu_reg_off;
750 unsigned long pamu_reg_base;
751 struct pamu_isr_data *data = NULL;
752 struct device_node *guts_node;
757 phys_addr_t ppaact_phys;
758 phys_addr_t spaact_phys;
760 phys_addr_t omt_phys;
762 unsigned int order = 0;
766 * enumerate all PAMUs and allocate and setup PAMU tables
768 * NOTE : All PAMUs share the same LIODN tables.
774 pamu_regs = of_iomap(dev->of_node, 0);
776 dev_err(dev, "ioremap of PAMU node failed\n");
779 of_get_address(dev->of_node, 0, &size, NULL);
781 irq = irq_of_parse_and_map(dev->of_node, 0);
783 dev_warn(dev, "no interrupts listed in PAMU node\n");
787 data = kzalloc(sizeof(*data), GFP_KERNEL);
792 data->pamu_reg_base = pamu_regs;
793 data->count = size / PAMU_OFFSET;
795 /* The ISR needs access to the regs, so we won't iounmap them */
796 ret = request_irq(irq, pamu_av_isr, 0, "pamu", data);
798 dev_err(dev, "error %i installing ISR for irq %i\n", ret, irq);
802 guts_node = of_find_matching_node(NULL, guts_device_ids);
804 dev_err(dev, "could not find GUTS node %pOF\n", dev->of_node);
809 guts_regs = of_iomap(guts_node, 0);
810 of_node_put(guts_node);
812 dev_err(dev, "ioremap of GUTS node failed\n");
817 /* read in the PAMU capability registers */
818 get_pamu_cap_values((unsigned long)pamu_regs);
820 * To simplify the allocation of a coherency domain, we allocate the
821 * PAACT and the OMT in the same memory buffer. Unfortunately, this
822 * wastes more memory compared to allocating the buffers separately.
824 /* Determine how much memory we need */
825 mem_size = (PAGE_SIZE << get_order(PAACT_SIZE)) +
826 (PAGE_SIZE << get_order(SPAACT_SIZE)) +
827 (PAGE_SIZE << get_order(OMT_SIZE));
828 order = get_order(mem_size);
830 p = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
832 dev_err(dev, "unable to allocate PAACT/SPAACT/OMT block\n");
837 ppaact = page_address(p);
838 ppaact_phys = page_to_phys(p);
840 /* Make sure the memory is naturally aligned */
841 if (ppaact_phys & ((PAGE_SIZE << order) - 1)) {
842 dev_err(dev, "PAACT/OMT block is unaligned\n");
847 spaact = (void *)ppaact + (PAGE_SIZE << get_order(PAACT_SIZE));
848 omt = (void *)spaact + (PAGE_SIZE << get_order(SPAACT_SIZE));
850 dev_dbg(dev, "ppaact virt=%p phys=%pa\n", ppaact, &ppaact_phys);
852 /* Check to see if we need to implement the work-around on this SOC */
854 /* Determine the Port ID for our coherence subdomain */
855 for (i = 0; i < ARRAY_SIZE(port_id_map); i++) {
856 if (port_id_map[i].svr == (mfspr(SPRN_SVR) & ~SVR_SECURITY)) {
857 csd_port_id = port_id_map[i].port_id;
858 dev_dbg(dev, "found matching SVR %08x\n",
865 dev_dbg(dev, "creating coherency subdomain at address %pa, size %zu, port id 0x%08x",
866 &ppaact_phys, mem_size, csd_port_id);
868 ret = create_csd(ppaact_phys, mem_size, csd_port_id);
870 dev_err(dev, "could not create coherence subdomain\n");
875 spaact_phys = virt_to_phys(spaact);
876 omt_phys = virt_to_phys(omt);
878 pamubypenr = in_be32(&guts_regs->pamubypenr);
880 for (pamu_reg_off = 0, pamu_counter = 0x80000000; pamu_reg_off < size;
881 pamu_reg_off += PAMU_OFFSET, pamu_counter >>= 1) {
883 pamu_reg_base = (unsigned long)pamu_regs + pamu_reg_off;
884 setup_one_pamu(pamu_reg_base, pamu_reg_off, ppaact_phys,
885 spaact_phys, omt_phys);
886 /* Disable PAMU bypass for this PAMU */
887 pamubypenr &= ~pamu_counter;
892 /* Enable all relevant PAMU(s) */
893 out_be32(&guts_regs->pamubypenr, pamubypenr);
897 /* Enable DMA for the LIODNs in the device tree */
909 kfree_sensitive(data);
918 free_pages((unsigned long)ppaact, order);
925 static struct platform_driver fsl_of_pamu_driver = {
927 .name = "fsl-of-pamu",
929 .probe = fsl_pamu_probe,
932 static __init int fsl_pamu_init(void)
934 struct platform_device *pdev = NULL;
935 struct device_node *np;
939 * The normal OF process calls the probe function at some
940 * indeterminate later time, after most drivers have loaded. This is
941 * too late for us, because PAMU clients (like the Qman driver)
942 * depend on PAMU being initialized early.
944 * So instead, we "manually" call our probe function by creating the
945 * platform devices ourselves.
949 * We assume that there is only one PAMU node in the device tree. A
950 * single PAMU node represents all of the PAMU devices in the SOC
951 * already. Everything else already makes that assumption, and the
952 * binding for the PAMU nodes doesn't allow for any parent-child
953 * relationships anyway. In other words, support for more than one
954 * PAMU node would require significant changes to a lot of code.
957 np = of_find_compatible_node(NULL, NULL, "fsl,pamu");
959 pr_err("could not find a PAMU node\n");
963 ret = platform_driver_register(&fsl_of_pamu_driver);
965 pr_err("could not register driver (err=%i)\n", ret);
966 goto error_driver_register;
969 pdev = platform_device_alloc("fsl-of-pamu", 0);
971 pr_err("could not allocate device %pOF\n", np);
973 goto error_device_alloc;
975 pdev->dev.of_node = of_node_get(np);
977 ret = pamu_domain_init();
979 goto error_device_add;
981 ret = platform_device_add(pdev);
983 pr_err("could not add device %pOF (err=%i)\n", np, ret);
984 goto error_device_add;
990 of_node_put(pdev->dev.of_node);
991 pdev->dev.of_node = NULL;
993 platform_device_put(pdev);
996 platform_driver_unregister(&fsl_of_pamu_driver);
998 error_driver_register:
1003 arch_initcall(fsl_pamu_init);